Don’t let a limited budget curtail plans. You can do a whole lot with a few choice acquisitions. Start with five MaKey MaKeys, three littleBits kits (space kit, synth, and premium), and Sphero. Want to try some coding ideas? Scratch is great with MaKey MaKeys. Also, look at free iPad Tickle app for programming Spheros. For the younger set, try Dash and Dot for beginner robotics.
http://www.slj.com/2015/10/public-libraries/final-maker-workshop-webcast/#_